Under Assembly Bill 746, which took effect January 1, 2018, community water systems statewide are required to complete lead sampling on the drinking water supplies of K-12 public schools built before 2010, along with daycare and preschools on public school properties. Water systems are required to complete this mandatory sampling by July 1, 2019.

State-mandated lead testing of Dublin Unified School Districts' water system was conducted in December of 2018 by the Dublin San Ramon Services District. Across all Dublin school sites, no water source exceeded the EPA action level of 15 parts per billion.

As a result of the findings, no remedies or corrective actions are required by the state.